Most Florida International University students leave campus from Friday to Sunday, which makes the place perfect for strapping on a pair of blades. Concrete was king back in the late Sixties and early Seventies when FIU was built, so there are long walkways and spacious courtyards that provide plenty of room to gain momentum. Marathoners can circle the sprawling property, which covers twenty city blocks. It's not as trendy as the Beach, but parking is easy, space is abundant, and there is no gawking audience to witness your spectacular tumbles.